Carton and closure therefor



M y 1950 c. R. YANCEY 2,507,430

CARTON AND CLOSURE THEREFOR Filed Sept. 11, 1944 3 Sheets-Sheet 1 n2 Wi i M2708 y 9, 1950 c. R. YANCEY 2,507,430

CARTON AND CLOSURE THEREFOR Filed Sept. 11, 1944 3 Sheets-Sheet 2 9, 1950 c. R. YANCEY 2,507,430

CARTON AND CLOSURE THEREFOR Filed Sept. 11, 1944 3 Sheets-Sheet 3 36 .36 39 42 3a 42 :9 f I i I l Patented May 9, 1950 CARTON AND CLOSURE THEREFOR Charles R. Yancey, Dallas, Tex., assignor of onehalf to Katherine Knapp Yancey, Dallas, Tex.

Application September 11, 1944, Serial No. 553,651

12 Claims. 1

This invention relates to new and useful improvements in cartons and similar containers, and in adjustable closures therefor.

Folded cartons are cheap and efiicient containers for a variety of flake, granular, and pow- 5 der products such as breakfast cereals, coffee, sugar, flour, soap powders, etc. Unfortunately, however, most of such cartons are not provided with eflicient means for opening and re-closure, so that when they are opened by the ultimate consumer the contents remain exposed to contamination by insects and dirt, and to deterioration from the oxygen and moisture in the air. Neither are there any means provided for controlling the volume of pour, nor to guard against accidental spillage. Therefore, in use by the ultimate consumer, such defects are irritating and uneconomical.

Some cartons have been devised with integral re-closable apertures for emptying the contents. In practice, however, these mechanisms are either limited as to the products they will efficiently dispense, or they will not tightly re-close the carton. Other cartons have been devised with separate closure pieces which are inserted or attached at some stage of production by the carton manufacturer or by the packer who fills such cartons. As to the latter of these, it is common knowledge in the industry that cartons so equipped are relatively expensiveeither in their initial price, or in the additional costs of filling and sealing them., Factors causing such increased costs are presented later herein.

In present practice the standard folding carton is manufactured from a sheet of cardboard which is printed, die-cut, scored, glued, and folded into flat position by highly developed machinery which operates at extremely fast speeds so that the cost of such a container is surprisingly low.

The folded cartons are then shipped to the manufacturers who pack their products therein. For such factories additional intricate machinery has been developed which performs the follow-- ing operations:

1. Receives a stack of the fiat folded cartons, the top and bottom end fiaps being open and unsealed.

2. Opens the fiat folded carton into a box-the end flaps of which are still open andunsealed.

3. Closes and seals the bottom end flaps.

4. Fills the carton.

5. Closes and seals the top end flaps.

6. Delivers the filled and sealed carton to a point for packing into shipping cases.

carton forming, filling and sealing machines are very fast and inexpensive in their operations. Some operate at a speed of filled cartons per minute, or nearly three completed cartons per second. Only one operator is required to attend such a machine.

Hence, it will be readily understood that any closure device which slows down or hinders the operation of such carton manufacturing or filling equipment is generally considered undesirable by the industry because of costs, regardless of the added convenience which such closure device may offer to the ultimate consumer.

It is, therefore, the principal object of this invention to provide an improved carton with an adjustable closure device which is a part of the carton itself and integral with the material thereof, which carton and closure may be manufactured by standard carton manufacturing machinery and processes, and later be formed, filled and sealed by standard carton forming, filling, and sealing machinery and procedures, with virtually no additions or changes in such machinery, and with no appreciable reduction in the production speeds and no requirement of machinery or labor for the application of a separate closure device.

It is a corollary objective to provide a carton and closure of the character described which would have no separate pieces, awkward shape, springiness, or excess bulk which would interfere with the fast precise operation of modern carton manufacturing machinery, or with the operation of modern carton forming, filling and sealing machinery, or with the machine wrapping of such cartons, or with the efficient packing of the cartons into standard shipping cases.

0 It is, of course, an ultimate object of this invention to provide a carton and closure of the character described which will enable the package to be easily opened and effectively re-closed so as to prevent contamination of the contents by dirt or insects, lessen the deterioration caused by the interchange of air with its oxygen and moisture, enable the user to easily control the volume of pour when emptying the said package, and avoid accidental spillage.

An object of the second species of this invention is to provide a carton with an integral retrogradable pouring spout which may be adjustably opened and re-closed to obtain the ends listed in the foregoing paragraphs with the convenience offered by a pouring spout.

Additional objects and advantages of the invention will be apparent from the following description of a carton and improved closures therefor, manufactured in accordance with the invention, and by reference to the accompanying drawings which illustrate preferred embodiments of the same. For ready comparison, one drawing is provided to illustrate a carton blank made according to present practices of the industry.

Figure 1 is a plan view of a cut, scored, andglued carton blank made according to present practices of the industry. (This drawing is submitted for comparison purposes only.)

Figure 2 is a plan View of a cut, scored, perforated, and glued carton blankwhich incorporates a closure, all according to the first species ofmy invention.

Figure 3 is a sectional view of my improved carton in folded form taken along the line 3--3 in Figure 2.

Fi ure 4 is. an isometricview; of, f rmed an sealedqcarton. accordin to the in ent on show n an external view r; the slide type clo re v c before it has been us d:

Fi ure 51s .aplan vi w o he slid n o re gate af er it..b,een remov d rom th car on- Figure 6 is a sectional view through the formed cartonrtakensubstant ally a on the, line inFieiire 2.. ai errcmovalqithe aper u eci nsbut beiere. nsertion. o t e l d n clo u ate betw en theno e b dy wall, panels.

Fi u e. l is s .v v ew. f a carton ad ccord ng to, tbein enti a wherein e ea t aperture piece has beer rexn oved and the adicsta le liding desire. st e is in partially closed Qpe timei1c sit iis Figures illustrates a plan View of the inside panel of the double wall according to the second sp es o he nve tion.

Fig-urea is a, plan view of the outside panel of the double body wall according to the second spe ie Figure l9 iS-,an -isometric view of a formed carton according to the second species showing h spou in ring p tio A -stated, Figure 1 shows a sheet of cardboard which hasbeen cut and scored so as to form four body panels with their accompanying end flaps. The sheet is. then folded so that the tab ll may be cemented to. the, outside vertical margin of the body panel on the other end of the sheet, thus forming a flat folded carton with open end flaps. The sheet thus, fabricated is a standard carton blank according to present practices of the. industry.

In the first species of my invention, as shown in Fig. 2, a sheet of cardboard'or other suitable material i2 is out and scored so that five body panels l3, l4, l; l5, and I! are provided. Only four of these will ordinarily have accompanying end flaps. The sheet 12 is folded along scored folding lines I8 and [9 so that the left side interior panel 13 underlies the left side exterior panel I7. Two parallel glue lines along the opposite vertical margins of panel 63 cement the two panels together, leaving a centrally dis.- posed uncemented area or slot 219 between such panels or layers. The purpose of this slot will be described later. A sectional view of the folded carton at this stage. is shown in Fig. 3. This section is along the line 3-3 in Fig. 2. This is the folded form in which the cartons would ordinarily be furnished to the product manufacturer bythe carton manufacturer.

Returning to Fig. 2, it. will be. seen that the left should ordinarily be proportionately larger in all plane dimensions than the potential aperture 2 I, for purposes described later. When the sheet i2 isfolded along-lines l8 and i9 and glued along adhesivelines id, as previously described and as shown in Fig 3, the vertical and transverse center point of potential aperture 2! on panel lit-should exactly underlie the vertical and transverse center point of opening 23 on panel l1. Thus. when the ar-cut piece 21.; has b en. T movedfmm the termed i led an e ed sa o ithe w ures. a fo d. assess or the c ntents f h car on. Qbr cus v. he ser ure n Pan 11 may; also, he oi t e pot n al ear-o t ree. it desired As as state prev ously. th two. lue, ines; H are locat d. along hev i iqal margins of anels. n re erre 9 t st ng-they; e nd om... e o t t e q iomci a d ane as lustra d n. F gnce uch QQ TQ E- iYBl ar o a t e v rall, w dth. ime s n o o en: in and 23 ar ea h na r w r n the w d h of h p ion f e r ne s y ie. ns de he lue, i e uncem nte m rgins w llbe t on both. sidesof openings 2| and23. The slot 2-9 formed between panels [3 and I1 thuscontinues on both sides of the apertures as shown in Fig 6. These uncemented marginal side frames on panel I! are designated 28a, and those on panel 13. are, designated 281).

On panel I! above the opening 2 3 a horizontally disposed length of cardboard 25 constitutes an p r e for urposes descr be ate At t e op f suc a el the nd flan 25. is urned down when the carton is sealed asshown in the taway View, Fi 7.- This end, flan 25 may e placed on the inside layer or panel {301' on the upper en s of both panels. if preferred.

On. an 3 abo e enin a ho z y ispos d len ho rdbdardjfib co st t n uppe yok r ur ses d cr b a e As e drawing, Fig. 2, indicates therefore. the uncernented area 2 9. continues above the apertures to the top of the carton through the yoke formed by parts 25a and 25b.

Immediately beneath the opening 23 on panel; 11, it is preferred that a horizontally disposed bar or yoke 21a be provided to link the lower parts of side frames 28a which frame the sides of opening 23. Immediately beneath opening 2| the lower parts of sideframes 2-82; are linked by lower yoke 21b. The slot 29 also continues through this loweryoke formed by parts 21 and 21b.

Itwill thus be seen that around apertures 2| and 2 3 there are upper yoke parts 250, and 25b and lower yoke parts 21a and 21?), with side frames 28a and 282;. It will be seen that these parts of the uncemented slot 29 constitute continuing and closely fitting compressive elements all around the opening into the carton, for purposes described hereinafter.

On panel ll beneath lower yoke part 21a, a

tear-out closure piece. ,orgate is formed by the,

semi-perforated and partially out lines 3| as shown in Fig. 2. This sliding closure gate will ordinarily be substantially rectangular in shape and slightly narrower than slot 29 .so that when it is removed from panel I! it may be 'slidably inserted vertically into slot 29 beneath yoke part 27a and between glue lines 20. The gate will be wider than openings 2! and 23 so that its vertical marginal edges will slide beneath aperture side frames 28a. and over side frames 2%. As to length, it should be at least as long as the distance from the top of panel I! to the bottom of lower yoke 21a plus a sufiicient portion for the operating handle 32 on the closure gate. From these specifications it will be apparent that when the closure gate is removed from panel ll and its top end inserted between lower yokes 21a, and 21b,

it may be slidably moved vertically into and.

through slot 29 until it strikes the end'fiap 26 completely closing the carton. As shown in Fig. 2, the vertical parts of lines 3| are cut slightly into the base part of lower yoke 21a to provide a flexible member or lip 33. This lip makes easier the insertion of the gate under such lower yoke.

Referring to Figures 4 and 7, when the consumer desires to open a carton which incorporates this improved sliding closure arrangement, the procedure is as follows: The tear-out opening 2! in the left side interior panel I3 is removed.

Next, the closure gate 30 is torn from panel ll. :9

The upper end of such gate is then inserted under the lower yoke 21a so that it may slide into the slot 23 formed between panels l3 and ii.

The closure gate 30 may then be moved upwardly over the opening 2| in the panel is so as to completely close the carton. Also, the closure gate may be adjustably moved to any point vertically over such opening so as to regulate very accurately the size of the aperture formed thereby.

It is emphasized that when the closure gate is in any position in the slot 29 the fit is very tight since the two panels I? and i3 lie absolutely flat one open the other, no space provision being made between them for interposing the closure gate therein. Further, since each of the glue lines 29 is strongly supported near an angular bend 32a and 32b of the package (see Fig. 6) the two panels are not loose and sagging, but are tightly bound together. The resultant pressure and friction exerted by the upper yoke parts 25a and 25b and the lower yoke parts 21a and 27b, and by the side frames 128a and 28b against both sides of the closure gateand thus completely around the apertures-is a definite advantage of this improved closure, as it will enable the closure gate to be frictionally held at whatever point it is adjusted to. The tight seal thus obtained around the apertures prevents even powdery materials from sifting around the gate. Since all the parts will usually be made of paper the parallel glue lines 26 will provide a satisfactory guide for the sliding gate and no objectionable sticking will be experienced. Of course, it will be obvious that the movement of the gate will be guided also by the vertical portions of the outer panel remaining after the gate is detached, which vertical portions are illustrated by lines 3|.

' Since, as stated earlier, opening 2| is smaller than opening 23, the marginal area 24 by which opening 21 is smaller may be seen through aperture 23 as shown in Fig. '7. Because of this dimensional difference when materials are being poured from the carton, they will tend to drop completely free of the carton and not lodge in the slot 29.

The tapered shape of the top parts of openings 2! and 23 is also emphasized. Such arrangement has two functions: First, because of such apexially tapered design it is possible to adjust the closure gate so as to provide the tiniest opening. Second, the tapered shapes offer no bar or stop to the upward movement of the sliding gate so that it may pass without hindrance into that part of slot 29 which lies between upper yoke parts 25a and 25b.

Obviously, the sliding gate may be perforated, if desired, so as to sift out contents of the carton.

By these convenient and easy means the consumer may open this improved carton, insert the closure gate, regulate easily the volume of pour from the package, then seal it against dirt, insects,

the interchange of air and accidental spillage until he desires to use the contents again.

As stated earlier, Figures 8, 9, and 10 illustrate a second species of the invention wherein means for a retrogradable pouring spout are provided in the double body wall of the carton.

In this species the perimetric' outline of the carton blank remains the same as in Fig. 2. The carton manufacturing procedures are similar except for the cutting, perforating and scoring of the closure parts. In particular, the construction of the double wall, panels l3 and I1, is identical except that the cementing of the two layers need not consist of two parallel lines in the second species. 7

Referring to Fig. 8, in the pouring spout species 2; the interior panel l3 of the double wall is provided with a centrally disposed adhesive repellent area 14 in the upper portion of the panel. This area is rendered repellent to adhesives by varnish, vqax, or other suitable material. Such inside layer it? is also provided with a partially cut-out removable aperture section 35 which is centrally disposed in the adhesive repellent area 44 as shown. A partially cut vertical slit 36 is laterally adjacent each side of aperture 35. Comparatively narrow strips of material 3'! are left between the aperture and the slits. The bottom points of the slits and the aperture should be on approxim'ately the same lateral plane. The top points of the slits should be at a desired distance below the top of the carton. The top point of the aperture is preferably lower than the toppoints of ie slits, as in Fig. 8.

Referring to Fig. 9, the outside panel ll of the double wall is provided with a partially cut-out hinged aperture member 38, the central portion of which is in opening alignment with the potential opening 35 in the inside panel l3. The shape and size of adhesive repellent area 44 and that of aperture member 38 are substantially the same. The upper portion of aperture member 38 may therefore be opened up by lifting it along partially out line 39. At the base of such aperture spout member 3-8 is a hinged joinder 40 to panel H as is shown in Fig. 10.

v This hinged joinder 40 should be situated in approximate horizontal alignment with the base of the potential aperture 35. The potential aperture 35 in the inside panel and the spout aperture 38 in the outside panel thus afford egress for contents of the carton when the closure device is opened as described later.

The laterally extending side portions 4| of the spout member are provided with vertical scored lines 42 which are in registering alignment with the slits 36. Therefore when spoutmember 38 7 is pivotally turned upon its hinged base the lateral portions 4! may be bent inwardly and insertcd into the 'cutslits "35. A pouring spout is thereby formed as'illustrat'edin Fig. 10.

It willbe understood that the slits 36 are to be cut'sothat their side portions will closely grip and frictionally holdthe'lateral side-portions of thespout at any point towhich the spout may be adjusted. Thus the spout may be opened from a closed position over the aperture 35 to any' point ofa 90 arc and thenfullyre-closed as desired. Such tight fit of the slits will also prevent the contents of the'carton from sifting aroundthe spout.

If-desired, each of the lateral portions 4] may be formed with a'notch'ed catch 43 at its extreme end. This catch is to extend beyond the top of the slits 38 when the side portion H is inserted therein, so that itprevents such side portion of the spout from leaving its position in the slit. When inserting the side portions into the slits it will be necessary only to bow them slightly so as to insert the notched catches first. The spout sides w-illthen'spring back into vertical alignment with the slits so that the catches become operative.

Since the two layers in .the double wall of this species are preferably cemented over most of their contiguous surfaces, the resultant double wall is very strong. Such'cementing will also prevent-the product from sifting between the two layers.

When a customer desires to open and use a carton of this species the procedure is' as follows: First, the upper portions'of spout aperture 38 along with its lateral side portions 4! are lifted with'a knife along the partially out line 39. The potential aperture'in panel I3 is then removed and the partially cut slits 35' are pierced with a knife. The lateral side portions 4| are then bent inwardly along lines 42 and inserted into the slits. The spout'thus formed may then be adjusted to'the desired position for use and then be reclcsed until additionalcontents are desired.

It will thus be seen that'both species of this improved carton offer definite advantages to the ultimate consumer. As to the carton manufacturer, and products manufacturer who fills the carton, the following advantages may be noted:

Attention is first called to the marked similarity between the present-day carton blank as shown in Fig. l, and the blank for my improved carton as shownin Fig. 2. The only additional material required by'ooth species of my improved carton is due to the greater width of my fifth body panel i3 whichdisplaces the present-day cemented tab H. The only other material 'difierences are in the additional cementing on my panel it as against the narrow cement line on tab ll of the present-day carton, andin the cutting and percrating for my closures on panels [3 and ll.

To manufacture'niy improved carton the only changes in equipment to be made by the carton manufacturer are: must be changed to add the fi th body panel and the closure -device perforations and cut-outs. 2. Additional glue applicator rolls must be used. Such changes are practicable and inexpensive.

Most carton closure devices, however, are deemed impractical because of difiiculties encountered by the manufacturer who-packs his products in such cartons. It is in his operations that many advantages of m improved carton'are fOund-marticulatly over those cartons which in- 1. Each carton cutting die c:

corporate closure devices in'the end flaps. Referringto column 1, wherein the operations of modern forming, filling, and sealing machines are listed, it is general knowledge in the industry-that any change in the customary end flap arrangementcf the presenbday folding carton is likely to retard or prevent the operation of such machines.

For example, some of the fastest forming and filling machines require for their forming operation the semi-circular cutouts 34 in certain end flaps as shown :in Fig. 2. Any re-closure device which precludes the provision of such'end flap cutouts will prevent or make difiicult the use of such machines. Other advantages of my improved carton over end flap re-closure arrangements lie in the uniformity of glue application, in strength of the cartons, and in the size of the apertures.

The glue required by my closure devices is applied by' the carton manufacturer while the sheet is in fiat form. At this stage the quantity of glue, width and straightness of the lines, and the pressure needed to properly set the glue ma -all be closely controlled. In contrast, those cartons which use the end flaps for the re-closure device must receive the glue application while the box is partially formed and quite flimsy. Hence, cementing factors such as quantity, precise cementing areas, and pressure for setting are all difficult to control at such time.

It is generally considered that glue must therefore be applied liberally over much of the area. of t .e flaps. Thus it will be evident that those closures which require'comparatively large uncemented areas in the end flaps cause the cartons to be weakened. Most of a cartons lateral strength comes from thoroughly cemented end flaps. A reduction in the cemented area of such flaps weakens the carton accordingly.

Each species of my improved carton makes no alteration whatsoever in the forming or sealing of such end flaps. More-over, tests show that the double wall. construction (panels 13 and I1) materially increases the vertical or compressive strength of the carton.

For reasons outlined above, in a carton which utilizes uncemented areas of end flaps, the aperture cannot be comparatively large without seriously Weea-kening'the carton. But due to the double wall construction and other structural elements of my improved carton, a relatively large aperture may be provided while still maintaining the strength and durability of the standard present-day carton.

Another advantage of this improved carton lies in the fact that there is only one thickness of material at all fold lines in the preferred con structionpf the double wall. This is important as-extra thickness at such fold lines causes the carton to be undesirably springy or obstructively resistant to forming machine operations.

While the references have uniformly indicated that the closure devices are located on a side body panel it is understood that they may be placed on any of the side body panels desired. As used herein, the term side body wall includes any body panel other than the end closure panels or flaps, and may be the front, back, or any side panel. Further, my device may be applied to cartons with more or fewer than four side walls.

Also, while the applicability of each species cfthe closure devices to folding cartons has been stresserlit is understood that they may 'alsobe used satisfactorily on set-up cartons and other 9 containers and that such usage is within the spirit of the invention.

In general it is understood that the forms of -my invention, herewith shown and described, are

transversely of the sheet, said sheet being also cut and scored along its top and bottom margins to provide top and bottom end flaps, the body panel at one end of the sheet being arranged to overlie the body panel at the other end of the sheet to provide a double wall in the formation of the carton, such layers in said double wall be ing cemented together along the vertical parallel margins of the layers, said parallel lines of adhesive leaving a centrally disposed uncemented area between them, the underlying panel being provided in its upper portion with a potential tear-out aperture, the overlying panel in the double wall being provided with aperture similar in shape to the potential aperture in the inside layer, said apertures being in substantial alignment so as to provide egress for contents of the carton, said apertures being transversely narrower than the uncemented area between the two parallel cement lines, a fiat substantially rectangular closure gate, said closure gate being narrower than the uncemented area between the two glue lines but wider than the apertures, the apertures being vertically shorter than the uncemented area between the two layers in the double wall, material in the outside layer beneath the aperture acting as a lower yoke, the closure gate when closed being long enough to extend from the top of the carton to a point below the lower yoke, and means for inserting said gate beneath said yoke to interpose the gate between the two layers of said double wall and between the two glue lines so that it may slide upwardly therein, said closure gate being adapted to adiustably close the apertures.

2. A carton and closure therefor made of a thin substantially rectangular sheet of suitable material, said sheet being cut and scored to form a series of centrally disposed body panels transversely of the sheet, said sheet being also cut and scored along its top and bottom margins to provide top and bottom end flaps for all of said body panels except one body panel, said out and scored body panels being adapted to form the body walls of the carton, the top and bottom end flaps being adapted to be folded and sealed inwardly and in overlapping contiguous planes to form the top and bottom respectively of the carton, the body panel at one end of the sheet being foldably arranged to overlie the panel at the other end of the sheet in the formation of the carton so that the panel without end flaps will underlie the other to provide a double wall, such layers in said double wall being cemented together along the vertical margins of said double wall, a centrally disposed uncemented area between said parallel lines of adhesive, the underlying panel being provided in its upper portion with a potential tearout aperture, said potential aperture being centrally located between the parallel glue lines, the outer layer in the double wall being provided with an aperture similar in shape to the potential aperture in the inner layer, said apertures being in substantial alignment so as to provide egress for contents of the carton, said apertures also being transversely narrower and vertically shorter than the unoemented area between the two glue lines, the overlying panel being provided in its lower portion with a tear-out section of substantially rectangular shape adapted to form a 010- sure gate, such closure gate being narrower than the uncemented area between the two glue lines but wider than the apertures, a yoke of material in the outside layer adjacent the bottom of the aperture, the closure gate being long enough to extend from the top of the carton to a point below the yoke, means for inserting said gate beneath said yoke to interpose the gate between the two layers of the double wall and between the two glue lines so that it may slide upwardly in the uncemented area, said closure gate being adapted to adjustably close the apertures, and the infolded end flap of the outer layer being adapted to act as a stop for the upward movement of the sliding closure gate.

3. A carton having side body walls and end closure flaps and including, a side body wall formed of two substantially coextensive contiguous layers of material having means providing an aperture therethroughfand a movable closure member for said aperture slidable between said layers of material.

4. A carton having side body walls and end closure flaps and including, a side body wall formed of two substantially coextensive contiguous layers of material having means providing an aperture therethrough, a movable closure member for said aperture slidable between said layers, and means on the body wall for engaging and guiding the closure member in its sliding movement.

5. In a carton having side body walls and end closure members the improvement which includes, a side body wall formed with only two layers of material joined together along opposite parallel margins and having an unjoined area between said joined margins, said side body wall having an initially closed aperture therethrough, and movable means slidable between the two layers of said body wall in the unjoined area to adjustably close the aperture.

6. A carton having side body walls and end closure members and including, a side body wall formed of two layers of sheet material, means joining the two layers together along opposite parallel margins to hold said layers in juxtaposition with an unjoined area between said joined margins, said side body wall being provided with an initially closed aperture, and a closure gate adapted to be interposed between the two layers of said side body wall and to slide there-between to adjustably close the aperture after the same has been initially opened.

'7. A carton substantially as set forth in claim 6, wherein the upper portion of the aperture is convergent to gradually reduce the width of said upper portion of the aperture.

8. A carton having side body walls and end closure members and including, a side body wall formed of two substantialy coextensive contiguous layers of material and having an aperture therein, means joining the two layers of material leaving the portions of the layers adjacent the aperture unjoined, and a movable closure member insertable between the unjoined portions "ofthe-l'ay'ers of the side body walllyingadjacent the aperture and slidable therebetweento adjustably open and. close the aperture, the fricti'onal'engagement of the unjoinedp'ortionsof the layers of the body wall with the closure member providing means for holding the closure memher in various adjusted positions.

9. A carton substantially as set forth in claim 6, wherein the outer layer of the side body wall has means for guiding the closure gate in its sliding movements.

10. In a carton having side body walls and end closure flaps, a side body wall formed of two layers of sheet material cemented together along opposite parallel margins and having an uncemented area between such margins, the layers of said body wall each having a substantially registering aperture section narrower and shorter than the uncemented area between said layers, means initially closing said apertures, a substantially transverse yoke member provided in the outer layer of the side body wall immediately adjacent the aperture in such layer, a portion of the outer layer being cut to provide a. flat substantially rectangular imperfcrateclosure member, said closure member being separable from the remainder of the outer layer and insertable under the yoke into the uncementedarea between the layers and to slide therebetween to adjustably open and close the aperture after the initial closure has been opened.

11. In a carton having side body walls and end closure flaps, a side body wall formed of, two layeds of sheet material cemented together along opposite parallel margins and having an uncemented area between such margins, the layers of said body wall each having a substantially registering aperture section narrower and shorter substantially rectangular imperforate closure member; and flexible means in the outer'layer which may be raised to facilitate insertion or: the closure member between the two layers. of: the side body wall to permit saidclosure member, to be interposed between said layers of: the side body wall and to slide therebetween to adjustably open. and close the aperture after the initial closure has been removed.

12. In a, carton having side body walls and end closure flaps the improvement which includes, a side body wall formed of two layers of sheet material cemented together along opposite parallel margins and having an uncemented area between the'marginal areas of said two layers, each layer having an aperture substantially registering with the aperture of the'other layer, removable means initially closing one aperture, and a flat substantially rectangular detachable piece of the outer layer of sheet material forming a closure gate adapted to be detached from said outer layer of sheet material and to be inserted between the uncemented portions of the two layers of the side body wall and to slide therebetween to adjustably open and close the apertures after the removable closure means has been removed.

CHARLES R. YANCEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,007,390 Robinson Oct. 31, 1911 1,494,515 Whippey May 20, 1924 1,539,985 Allen June 2, 1925 1,666,439 Metzger Nov. 9, 1926 1,746,006 Metzger Feb. 4, 1930 2,069,281 Sebreny Feb. 2, 193'? 2,285,067 Thompson June 2, 1942 Certificate of Correction Patent No. 2,507,430 May 9, 1950 CHARLES R. YANCEY It is hereby certified that errors appear in the printed specification of the above numbered patent requiring correction as follows:

Column 5, line 44, for the word open read upon; column 9, line 30, before aperture insert an; column 10, line 70, for substantialy read substantially;

and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 1st day of August, A. D. 1950.

THOMAS F. MURPHY,

Assistant Gommz'ssioner of Patents. 

